Resource is out of sync with the file system: '/testpers/src/model/components.properties'.

org.eclipse.core.internal.resources.ResourceException: Resource is out of sync with the file system: '/testpers/src/model/components.properties'.
	at org.eclipse.core.internal.localstore.FileSystemResourceManager.read(FileSystemResourceManager.java:610)
	at org.eclipse.core.internal.resources.File.getContents(File.java:287)
	at org.eclipse.core.internal.resources.File.getContents(File.java:276)
	at org.eclipse.jpt.core.internal.JpaFileContentRegistry.getFile(JpaFileContentRegistry.java:32)
	at org.eclipse.jpt.core.internal.JpaProject.createJpaFile(JpaProject.java:664)
	at org.eclipse.jpt.core.internal.JpaProject$4.visit(JpaProject.java:640)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:67)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:76)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:76)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:76)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:48)
	at org.eclipse.jpt.core.internal.JpaProject.synchInternalResources(JpaProject.java:624)
	at org.eclipse.jpt.core.internal.JpaModelManager$ResourceChangeProcessor.checkForFilesBeingAddedOrRemoved(JpaModelManager.java:393)
	at org.eclipse.jpt.core.internal.JpaModelManager$ResourceChangeProcessor.checkForFilesBeingAddedOrRemoved(JpaModelManager.java:405)
	at org.eclipse.jpt.core.internal.JpaModelManager$ResourceChangeProcessor.resourceChanged(JpaModelManager.java:365)
	at org.eclipse.jpt.core.internal.JpaModelManager$ResourceChangeListener.resourceChanged(JpaModelManager.java:320)
	at org.eclipse.core.internal.events.NotificationManager$2.run(NotificationManager.java:282)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
	at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:276)
	at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:148)
	at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:311)
	at org.eclipse.core.internal.resources.Workspace.endOperation(Workspace.java:1018)
	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1806)
	at org.eclipse.wst.common.project.facet.ui.ModifyFacetedProjectWizard$3.run(ModifyFacetedProjectWizard.java:275)
	at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:113)